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The Martin PBM Mariner was the Accident-Prone Forerunner Of The 2016 Oshkosh Star Martin Mars​

The feature photo depicts a Martin Mariner , beached for a clean up at Banana River, Florida. Surely no bad job for the boys. In this fine picture , you’ll notice the rather impressive dimensions of this aircraft , powered with only 2 radial engines Wright R-2600 ( max 1700 HP each, later upgraded to 1900 HP each). One of the major flaws in this design seems rather obvious, it was an underpowered aircraft. Later the PMB-5 version was upgraded with the use of the R-2800 engines ( max 2100 HP each). But that extra power was partly offset in the Amphibian version PBM-5A against the extra weight of the retractable tricycle landing gear. The depicted PBM-3 had an empty weight of 15 tons and a loaded weight of 25 tons. To get that weight airborne with their max 2 x 1700 HP in a rather high-drag-coefficient airframe ( by its floats and boat keel with a large frontal surface), many a Mariner pilot must have experienced hairy moments on water take offs from limited waters like lakes and rivers, due to its long runs to get airborne.

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Moving target…I’m pretty sure some of the Local Twin Otter pilots could land on that. A few years back a couple of them from Kenn Borek Air ,flew from Tierra Del Fuego using extended range tanks to Antarctica to drop chemotherapy drugs for a US female doctor who had diagnosed herself with cancer. This was at the peak of winter with a white out and -60c ambient. They couldn’t land obviously but were able to drop the package with a locator and got the job done. I flew all over the North in all kinds of conditions countless times over the last 30 years with numerous of them and can vouch for their incredible skill. Amazing.
 
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The M.39B Libellula (from Libellulidae, a taxonomic familyof dragonflies) was a Second World War tandem wingexperimental aircraft built by Miles Aircraft, designed to give the pilot the best view possible for landing on aircraft carriers. A scale version of the M.39 design was proposed by Miles to meet Air Ministry specification B.11/41 for a fast bomber.[1] The M.39B was used by Miles to generate data from which the M.39 design was improved, but the M.39 project was cancelled and the M.39B broken up.
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